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-rw-r--r--src/libvpsc/csolve_VPSC.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libvpsc/csolve_VPSC.cpp b/src/libvpsc/csolve_VPSC.cpp
index bd7db5ab2..5176242d5 100644
--- a/src/libvpsc/csolve_VPSC.cpp
+++ b/src/libvpsc/csolve_VPSC.cpp
@@ -10,6 +10,7 @@
*/
#include <iostream>
#include <cassert>
+#include <cstdlib>
#include "variable.h"
#include "constraint.h"
#include "generate-constraints.h"